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| 1 /* | |
| 2 * Copyright (C) 2007 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "DragController.h" | |
| 28 | |
| 29 #include "CSSStyleDeclaration.h" | |
| 30 #include "Clipboard.h" | |
| 31 #include "ClipboardAccessPolicy.h" | |
| 32 #include "DocLoader.h" | |
| 33 #include "Document.h" | |
| 34 #include "DocumentFragment.h" | |
| 35 #include "DragActions.h" | |
| 36 #include "DragClient.h" | |
| 37 #include "DragData.h" | |
| 38 #include "Editor.h" | |
| 39 #include "EditorClient.h" | |
| 40 #include "Element.h" | |
| 41 #include "EventHandler.h" | |
| 42 #include "FloatRect.h" | |
| 43 #include "Frame.h" | |
| 44 #include "FrameLoader.h" | |
| 45 #include "FrameView.h" | |
| 46 #include "HTMLAnchorElement.h" | |
| 47 #include "HTMLInputElement.h" | |
| 48 #include "HTMLNames.h" | |
| 49 #include "HitTestResult.h" | |
| 50 #include "Image.h" | |
| 51 #include "MoveSelectionCommand.h" | |
| 52 #include "Node.h" | |
| 53 #include "Page.h" | |
| 54 #include "RenderFileUploadControl.h" | |
| 55 #include "RenderImage.h" | |
| 56 #include "ReplaceSelectionCommand.h" | |
| 57 #include "ResourceRequest.h" | |
| 58 #include "SelectionController.h" | |
| 59 #include "Settings.h" | |
| 60 #include "SystemTime.h" | |
| 61 #include "Text.h" | |
| 62 #include "markup.h" | |
| 63 #include <wtf/RefPtr.h> | |
| 64 | |
| 65 namespace WebCore { | |
| 66 | |
| 67 static PlatformMouseEvent createMouseEvent(DragData* dragData) | |
| 68 { | |
| 69 // FIXME: We should fake modifier keys here. | |
| 70 return PlatformMouseEvent(dragData->clientPosition(), dragData->globalPositi
on(), | |
| 71 LeftButton, MouseEventMoved, 0, false, false, fals
e, false, currentTime()); | |
| 72 | |
| 73 } | |
| 74 | |
| 75 DragController::DragController(Page* page, DragClient* client) | |
| 76 : m_page(page) | |
| 77 , m_client(client) | |
| 78 , m_document(0) | |
| 79 , m_dragInitiator(0) | |
| 80 , m_dragDestinationAction(DragDestinationActionNone) | |
| 81 , m_dragSourceAction(DragSourceActionNone) | |
| 82 , m_didInitiateDrag(false) | |
| 83 , m_isHandlingDrag(false) | |
| 84 , m_dragOperation(DragOperationNone) | |
| 85 { | |
| 86 } | |
| 87 | |
| 88 DragController::~DragController() | |
| 89 { | |
| 90 m_client->dragControllerDestroyed(); | |
| 91 } | |
| 92 | |
| 93 static PassRefPtr<DocumentFragment> documentFragmentFromDragData(DragData* dragD
ata, RefPtr<Range> context, | |
| 94 bool allowPlainText, bool& chosePlainT
ext) | |
| 95 { | |
| 96 ASSERT(dragData); | |
| 97 chosePlainText = false; | |
| 98 | |
| 99 Document* document = context->ownerDocument(); | |
| 100 ASSERT(document); | |
| 101 if (document && dragData->containsCompatibleContent()) { | |
| 102 if (PassRefPtr<DocumentFragment> fragment = dragData->asFragment(documen
t)) | |
| 103 return fragment; | |
| 104 | |
| 105 if (dragData->containsURL()) { | |
| 106 String title; | |
| 107 String url = dragData->asURL(&title); | |
| 108 if (!url.isEmpty()) { | |
| 109 ExceptionCode ec; | |
| 110 RefPtr<HTMLAnchorElement> anchor = static_cast<HTMLAnchorElement
*>(document->createElement("a", ec).get()); | |
| 111 anchor->setHref(url); | |
| 112 RefPtr<Node> anchorText = document->createTextNode(title); | |
| 113 anchor->appendChild(anchorText, ec); | |
| 114 RefPtr<DocumentFragment> fragment = document->createDocumentFrag
ment(); | |
| 115 fragment->appendChild(anchor, ec); | |
| 116 return fragment.get(); | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 if (allowPlainText && dragData->containsPlainText()) { | |
| 121 chosePlainText = true; | |
| 122 return createFragmentFromText(context.get(), dragData->asPlainText()).ge
t(); | |
| 123 } | |
| 124 | |
| 125 return 0; | |
| 126 } | |
| 127 | |
| 128 bool DragController::dragIsMove(SelectionController* selection, DragData* dragDa
ta) | |
| 129 { | |
| 130 return m_document == m_dragInitiator | |
| 131 && selection->isContentEditable() | |
| 132 && !isCopyKeyDown(); | |
| 133 } | |
| 134 | |
| 135 void DragController::cancelDrag() | |
| 136 { | |
| 137 m_page->dragCaretController()->clear(); | |
| 138 } | |
| 139 | |
| 140 void DragController::dragEnded() | |
| 141 { | |
| 142 m_dragInitiator = 0; | |
| 143 m_didInitiateDrag = false; | |
| 144 m_page->dragCaretController()->clear(); | |
| 145 } | |
| 146 | |
| 147 DragOperation DragController::dragEntered(DragData* dragData) | |
| 148 { | |
| 149 return dragEnteredOrUpdated(dragData); | |
| 150 } | |
| 151 | |
| 152 void DragController::dragExited(DragData* dragData) | |
| 153 { | |
| 154 ASSERT(dragData); | |
| 155 Frame* mainFrame = m_page->mainFrame(); | |
| 156 | |
| 157 if (RefPtr<FrameView> v = mainFrame->view()) { | |
| 158 ClipboardAccessPolicy policy = mainFrame->loader()->baseURL().isLocalFil
e() ? ClipboardReadable : ClipboardTypesReadable; | |
| 159 RefPtr<Clipboard> clipboard = dragData->createClipboard(policy); | |
| 160 clipboard->setSourceOperation(dragData->draggingSourceOperationMask()); | |
| 161 mainFrame->eventHandler()->cancelDragAndDrop(createMouseEvent(dragData),
clipboard.get()); | |
| 162 clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard he
re for security | |
| 163 } | |
| 164 | |
| 165 cancelDrag(); | |
| 166 m_document = 0; | |
| 167 } | |
| 168 | |
| 169 DragOperation DragController::dragUpdated(DragData* dragData) | |
| 170 { | |
| 171 return dragEnteredOrUpdated(dragData); | |
| 172 } | |
| 173 | |
| 174 bool DragController::performDrag(DragData* dragData) | |
| 175 { | |
| 176 ASSERT(dragData); | |
| 177 m_document = m_page->mainFrame()->documentAtPoint(dragData->clientPosition()
); | |
| 178 if (m_isHandlingDrag) { | |
| 179 ASSERT(m_dragDestinationAction & DragDestinationActionDHTML); | |
| 180 m_client->willPerformDragDestinationAction(DragDestinationActionDHTML, d
ragData); | |
| 181 RefPtr<Frame> mainFrame = m_page->mainFrame(); | |
| 182 if (mainFrame->view()) { | |
| 183 // Sending an event can result in the destruction of the view and pa
rt. | |
| 184 RefPtr<Clipboard> clipboard = dragData->createClipboard(ClipboardRea
dable); | |
| 185 clipboard->setSourceOperation(dragData->draggingSourceOperationMask(
)); | |
| 186 mainFrame->eventHandler()->performDragAndDrop(createMouseEvent(dragD
ata), clipboard.get()); | |
| 187 clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboar
d here for security | |
| 188 } | |
| 189 m_document = 0; | |
| 190 return true; | |
| 191 } | |
| 192 | |
| 193 if ((m_dragDestinationAction & DragDestinationActionEdit) && concludeDrag(dr
agData, m_dragDestinationAction)) { | |
| 194 m_document = 0; | |
| 195 return true; | |
| 196 } | |
| 197 | |
| 198 m_document = 0; | |
| 199 | |
| 200 if (operationForLoad(dragData) == DragOperationNone) | |
| 201 return false; | |
| 202 | |
| 203 m_client->willPerformDragDestinationAction(DragDestinationActionLoad, dragDa
ta); | |
| 204 m_page->mainFrame()->loader()->load(ResourceRequest(dragData->asURL())); | |
| 205 return true; | |
| 206 } | |
| 207 | |
| 208 DragOperation DragController::dragEnteredOrUpdated(DragData* dragData) | |
| 209 { | |
| 210 ASSERT(dragData); | |
| 211 IntPoint windowPoint = dragData->clientPosition(); | |
| 212 | |
| 213 Document* newDraggingDoc = 0; | |
| 214 if (Frame* frame = m_page->mainFrame()) | |
| 215 newDraggingDoc = frame->documentAtPoint(windowPoint); | |
| 216 if (m_document != newDraggingDoc) { | |
| 217 if (m_document) | |
| 218 cancelDrag(); | |
| 219 m_document = newDraggingDoc; | |
| 220 } | |
| 221 | |
| 222 m_dragDestinationAction = m_client->actionMaskForDrag(dragData); | |
| 223 | |
| 224 DragOperation operation = DragOperationNone; | |
| 225 | |
| 226 if (m_dragDestinationAction == DragDestinationActionNone) | |
| 227 cancelDrag(); | |
| 228 else { | |
| 229 operation = tryDocumentDrag(dragData, m_dragDestinationAction); | |
| 230 if (operation == DragOperationNone && (m_dragDestinationAction & DragDes
tinationActionLoad)) | |
| 231 return operationForLoad(dragData); | |
| 232 } | |
| 233 | |
| 234 return operation; | |
| 235 } | |
| 236 | |
| 237 static HTMLInputElement* asFileInput(Node* node) | |
| 238 { | |
| 239 ASSERT(node); | |
| 240 | |
| 241 // The button for a FILE input is a sub element with no set input type | |
| 242 // In order to get around this problem we assume any non-FILE input element | |
| 243 // is this internal button, and try querying the shadow parent node. | |
| 244 if (node->hasTagName(HTMLNames::inputTag) && node->isShadowNode() && static_
cast<HTMLInputElement*>(node)->inputType() != HTMLInputElement::FILE) | |
| 245 node = node->shadowParentNode(); | |
| 246 | |
| 247 if (!node || !node->hasTagName(HTMLNames::inputTag)) | |
| 248 return 0; | |
| 249 | |
| 250 HTMLInputElement* inputElem = static_cast<HTMLInputElement*>(node); | |
| 251 if (inputElem->inputType() == HTMLInputElement::FILE) | |
| 252 return inputElem; | |
| 253 | |
| 254 return 0; | |
| 255 } | |
| 256 | |
| 257 DragOperation DragController::tryDocumentDrag(DragData* dragData, DragDestinatio
nAction actionMask) | |
| 258 { | |
| 259 ASSERT(dragData); | |
| 260 | |
| 261 if (!m_document) | |
| 262 return DragOperationNone; | |
| 263 | |
| 264 DragOperation operation = DragOperationNone; | |
| 265 if (actionMask & DragDestinationActionDHTML) | |
| 266 operation = tryDHTMLDrag(dragData); | |
| 267 m_isHandlingDrag = operation != DragOperationNone; | |
| 268 | |
| 269 RefPtr<FrameView> frameView = m_document->view(); | |
| 270 if (!frameView) | |
| 271 return operation; | |
| 272 | |
| 273 if ((actionMask & DragDestinationActionEdit) && !m_isHandlingDrag && canProc
essDrag(dragData)) { | |
| 274 if (dragData->containsColor()) | |
| 275 return DragOperationGeneric; | |
| 276 | |
| 277 IntPoint dragPos = dragData->clientPosition(); | |
| 278 IntPoint point = frameView->windowToContents(dragPos); | |
| 279 Element* element = m_document->elementFromPoint(point.x(), point.y()); | |
| 280 ASSERT(element); | |
| 281 Frame* innerFrame = element->document()->frame(); | |
| 282 ASSERT(innerFrame); | |
| 283 if (!asFileInput(element)) { | |
| 284 Selection dragCaret; | |
| 285 if (Frame* frame = m_document->frame()) | |
| 286 dragCaret = frame->visiblePositionForPoint(point); | |
| 287 m_page->dragCaretController()->setSelection(dragCaret); | |
| 288 } | |
| 289 | |
| 290 return dragIsMove(innerFrame->selection(), dragData) ? DragOperationMove
: DragOperationCopy; | |
| 291 } | |
| 292 | |
| 293 m_page->dragCaretController()->clear(); | |
| 294 return operation; | |
| 295 } | |
| 296 | |
| 297 DragSourceAction DragController::delegateDragSourceAction(const IntPoint& window
Point) | |
| 298 { | |
| 299 m_dragSourceAction = m_client->dragSourceActionMaskForPoint(windowPoint); | |
| 300 return m_dragSourceAction; | |
| 301 } | |
| 302 | |
| 303 DragOperation DragController::operationForLoad(DragData* dragData) | |
| 304 { | |
| 305 ASSERT(dragData); | |
| 306 Document* doc = 0; | |
| 307 doc = m_page->mainFrame()->documentAtPoint(dragData->clientPosition()); | |
| 308 if (doc && (m_didInitiateDrag || doc->isPluginDocument() || (doc->frame() &&
doc->frame()->editor()->clientIsEditable()))) | |
| 309 return DragOperationNone; | |
| 310 return dragOperation(dragData); | |
| 311 } | |
| 312 | |
| 313 static bool setSelectionToDragCaret(Frame* frame, Selection& dragCaret, RefPtr<R
ange>& range, const IntPoint& point) | |
| 314 { | |
| 315 frame->selection()->setSelection(dragCaret); | |
| 316 if (frame->selection()->isNone()) { | |
| 317 dragCaret = frame->visiblePositionForPoint(point); | |
| 318 frame->selection()->setSelection(dragCaret); | |
| 319 range = dragCaret.toRange(); | |
| 320 } | |
| 321 return !frame->selection()->isNone() && frame->selection()->isContentEditabl
e(); | |
| 322 } | |
| 323 | |
| 324 bool DragController::concludeDrag(DragData* dragData, DragDestinationAction acti
onMask) | |
| 325 { | |
| 326 ASSERT(dragData); | |
| 327 ASSERT(!m_isHandlingDrag); | |
| 328 ASSERT(actionMask & DragDestinationActionEdit); | |
| 329 | |
| 330 if (!m_document) | |
| 331 return false; | |
| 332 | |
| 333 IntPoint point = m_document->view()->windowToContents(dragData->clientPositi
on()); | |
| 334 Element* element = m_document->elementFromPoint(point.x(), point.y()); | |
| 335 ASSERT(element); | |
| 336 Frame* innerFrame = element->ownerDocument()->frame(); | |
| 337 ASSERT(innerFrame); | |
| 338 | |
| 339 if (dragData->containsColor()) { | |
| 340 Color color = dragData->asColor(); | |
| 341 if (!color.isValid()) | |
| 342 return false; | |
| 343 if (!innerFrame) | |
| 344 return false; | |
| 345 RefPtr<Range> innerRange = innerFrame->selection()->toRange(); | |
| 346 RefPtr<CSSStyleDeclaration> style = m_document->createCSSStyleDeclaratio
n(); | |
| 347 ExceptionCode ec; | |
| 348 style->setProperty("color", color.name(), ec); | |
| 349 if (!innerFrame->editor()->shouldApplyStyle(style.get(), innerRange.get(
))) | |
| 350 return false; | |
| 351 m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dr
agData); | |
| 352 innerFrame->editor()->applyStyle(style.get(), EditActionSetColor); | |
| 353 return true; | |
| 354 } | |
| 355 | |
| 356 if (!m_page->dragController()->canProcessDrag(dragData)) { | |
| 357 m_page->dragCaretController()->clear(); | |
| 358 return false; | |
| 359 } | |
| 360 | |
| 361 if (HTMLInputElement* fileInput = asFileInput(element)) { | |
| 362 | |
| 363 if (!fileInput->isEnabled()) | |
| 364 return false; | |
| 365 | |
| 366 if (!dragData->containsFiles()) | |
| 367 return false; | |
| 368 | |
| 369 Vector<String> filenames; | |
| 370 dragData->asFilenames(filenames); | |
| 371 if (filenames.isEmpty()) | |
| 372 return false; | |
| 373 | |
| 374 // Ugly. For security none of the API's available to us to set the inpu
t value | |
| 375 // on file inputs. Even forcing a change in HTMLInputElement doesn't wo
rk as | |
| 376 // RenderFileUploadControl clears the file when doing updateFromElement(
) | |
| 377 RenderFileUploadControl* renderer = static_cast<RenderFileUploadControl*
>(fileInput->renderer()); | |
| 378 | |
| 379 if (!renderer) | |
| 380 return false; | |
| 381 | |
| 382 // Only take the first filename as <input type="file" /> can only accept
one | |
| 383 renderer->receiveDroppedFile(filenames[0]); | |
| 384 return true; | |
| 385 } | |
| 386 | |
| 387 Selection dragCaret(m_page->dragCaretController()->selection()); | |
| 388 m_page->dragCaretController()->clear(); | |
| 389 RefPtr<Range> range = dragCaret.toRange(); | |
| 390 | |
| 391 // For range to be null a WebKit client must have done something bad while | |
| 392 // manually controlling drag behaviour | |
| 393 if (!range) | |
| 394 return false; | |
| 395 DocLoader* loader = range->ownerDocument()->docLoader(); | |
| 396 loader->setAllowStaleResources(true); | |
| 397 if (dragIsMove(innerFrame->selection(), dragData) || dragCaret.isContentRich
lyEditable()) { | |
| 398 bool chosePlainText = false; | |
| 399 RefPtr<DocumentFragment> fragment = documentFragmentFromDragData(dragDat
a, range, true, chosePlainText); | |
| 400 if (!fragment || !innerFrame->editor()->shouldInsertFragment(fragment, r
ange, EditorInsertActionDropped)) { | |
| 401 loader->setAllowStaleResources(false); | |
| 402 return false; | |
| 403 } | |
| 404 | |
| 405 m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dr
agData); | |
| 406 if (dragIsMove(innerFrame->selection(), dragData)) { | |
| 407 bool smartMove = innerFrame->selectionGranularity() == WordGranulari
ty | |
| 408 && innerFrame->editor()->smartInsertDeleteEnabled() | |
| 409 && dragData->canSmartReplace(); | |
| 410 applyCommand(MoveSelectionCommand::create(fragment, dragCaret.base()
, smartMove)); | |
| 411 } else { | |
| 412 if (setSelectionToDragCaret(innerFrame, dragCaret, range, point)) | |
| 413 applyCommand(ReplaceSelectionCommand::create(m_document, fragmen
t, true, dragData->canSmartReplace(), chosePlainText)); | |
| 414 } | |
| 415 } else { | |
| 416 String text = dragData->asPlainText(); | |
| 417 if (text.isEmpty() || !innerFrame->editor()->shouldInsertText(text, rang
e.get(), EditorInsertActionDropped)) { | |
| 418 loader->setAllowStaleResources(false); | |
| 419 return false; | |
| 420 } | |
| 421 | |
| 422 m_client->willPerformDragDestinationAction(DragDestinationActionEdit, dr
agData); | |
| 423 if (setSelectionToDragCaret(innerFrame, dragCaret, range, point)) | |
| 424 applyCommand(ReplaceSelectionCommand::create(m_document, createFragm
entFromText(range.get(), text), true, false, true)); | |
| 425 } | |
| 426 loader->setAllowStaleResources(false); | |
| 427 | |
| 428 return true; | |
| 429 } | |
| 430 | |
| 431 | |
| 432 bool DragController::canProcessDrag(DragData* dragData) | |
| 433 { | |
| 434 ASSERT(dragData); | |
| 435 | |
| 436 if (!dragData->containsCompatibleContent()) | |
| 437 return false; | |
| 438 | |
| 439 IntPoint point = m_page->mainFrame()->view()->windowToContents(dragData->cli
entPosition()); | |
| 440 HitTestResult result = HitTestResult(point); | |
| 441 if (!m_page->mainFrame()->contentRenderer()) | |
| 442 return false; | |
| 443 | |
| 444 result = m_page->mainFrame()->eventHandler()->hitTestResultAtPoint(point, tr
ue); | |
| 445 | |
| 446 if (!result.innerNonSharedNode()) | |
| 447 return false; | |
| 448 | |
| 449 if (dragData->containsFiles() && asFileInput(result.innerNonSharedNode())) | |
| 450 return true; | |
| 451 | |
| 452 if (!result.innerNonSharedNode()->isContentEditable()) | |
| 453 return false; | |
| 454 | |
| 455 if (m_didInitiateDrag && m_document == m_dragInitiator && result.isSelected(
)) | |
| 456 return false; | |
| 457 | |
| 458 return true; | |
| 459 } | |
| 460 | |
| 461 DragOperation DragController::tryDHTMLDrag(DragData* dragData) | |
| 462 { | |
| 463 ASSERT(dragData); | |
| 464 ASSERT(m_document); | |
| 465 DragOperation op = DragOperationNone; | |
| 466 RefPtr<Frame> frame = m_page->mainFrame(); | |
| 467 RefPtr<FrameView> viewProtector = frame->view(); | |
| 468 if (!viewProtector) | |
| 469 return DragOperationNone; | |
| 470 | |
| 471 ClipboardAccessPolicy policy = frame->loader()->baseURL().isLocalFile() ? Cl
ipboardReadable : ClipboardTypesReadable; | |
| 472 RefPtr<Clipboard> clipboard = dragData->createClipboard(policy); | |
| 473 DragOperation srcOp = dragData->draggingSourceOperationMask(); | |
| 474 clipboard->setSourceOperation(srcOp); | |
| 475 | |
| 476 PlatformMouseEvent event = createMouseEvent(dragData); | |
| 477 if (frame->eventHandler()->updateDragAndDrop(event, clipboard.get())) { | |
| 478 // *op unchanged if no source op was set | |
| 479 if (!clipboard->destinationOperation(op)) { | |
| 480 // The element accepted but they didn't pick an operation, so we pic
k one for them | |
| 481 // (as does WinIE). | |
| 482 if (srcOp & DragOperationCopy) | |
| 483 op = DragOperationCopy; | |
| 484 else if (srcOp & DragOperationMove || srcOp & DragOperationGeneric) | |
| 485 op = DragOperationMove; | |
| 486 else if (srcOp & DragOperationLink) | |
| 487 op = DragOperationLink; | |
| 488 else | |
| 489 op = DragOperationGeneric; | |
| 490 } else if (!(op & srcOp)) { | |
| 491 op = DragOperationNone; | |
| 492 } | |
| 493 | |
| 494 clipboard->setAccessPolicy(ClipboardNumb); // invalidate clipboard he
re for security | |
| 495 return op; | |
| 496 } | |
| 497 return op; | |
| 498 } | |
| 499 | |
| 500 bool DragController::mayStartDragAtEventLocation(const Frame* frame, const IntPo
int& framePos) | |
| 501 { | |
| 502 ASSERT(frame); | |
| 503 ASSERT(frame->settings()); | |
| 504 | |
| 505 if (!frame->view() || !frame->contentRenderer()) | |
| 506 return false; | |
| 507 | |
| 508 HitTestResult mouseDownTarget = HitTestResult(framePos); | |
| 509 | |
| 510 mouseDownTarget = frame->eventHandler()->hitTestResultAtPoint(framePos, true
); | |
| 511 | |
| 512 if (mouseDownTarget.image() | |
| 513 && !mouseDownTarget.absoluteImageURL().isEmpty() | |
| 514 && frame->settings()->loadsImagesAutomatically() | |
| 515 && m_dragSourceAction & DragSourceActionImage) | |
| 516 return true; | |
| 517 | |
| 518 if (!mouseDownTarget.absoluteLinkURL().isEmpty() | |
| 519 && m_dragSourceAction & DragSourceActionLink | |
| 520 && mouseDownTarget.isLiveLink()) | |
| 521 return true; | |
| 522 | |
| 523 if (mouseDownTarget.isSelected() | |
| 524 && m_dragSourceAction & DragSourceActionSelection) | |
| 525 return true; | |
| 526 | |
| 527 return false; | |
| 528 | |
| 529 } | |
| 530 | |
| 531 static CachedImage* getCachedImage(Element* element) | |
| 532 { | |
| 533 ASSERT(element); | |
| 534 RenderObject* renderer = element->renderer(); | |
| 535 if (!renderer || !renderer->isImage()) | |
| 536 return 0; | |
| 537 RenderImage* image = static_cast<RenderImage*>(renderer); | |
| 538 return image->cachedImage(); | |
| 539 } | |
| 540 | |
| 541 static Image* getImage(Element* element) | |
| 542 { | |
| 543 ASSERT(element); | |
| 544 RenderObject* renderer = element->renderer(); | |
| 545 if (!renderer || !renderer->isImage()) | |
| 546 return 0; | |
| 547 | |
| 548 RenderImage* image = static_cast<RenderImage*>(renderer); | |
| 549 if (image->cachedImage() && !image->cachedImage()->errorOccurred()) | |
| 550 return image->cachedImage()->image(); | |
| 551 return 0; | |
| 552 } | |
| 553 | |
| 554 static void prepareClipboardForImageDrag(Frame* src, Clipboard* clipboard, Eleme
nt* node, const KURL& linkURL, const KURL& imageURL, const String& label) | |
| 555 { | |
| 556 RefPtr<Range> range = src->document()->createRange(); | |
| 557 ExceptionCode ec = 0; | |
| 558 range->selectNode(node, ec); | |
| 559 ASSERT(ec == 0); | |
| 560 src->selection()->setSelection(Selection(range.get(), DOWNSTREAM));
| |
| 561 clipboard->declareAndWriteDragImage(node, !linkURL.isEmpty() ? linkURL : ima
geURL, label, src); | |
| 562 } | |
| 563 | |
| 564 static IntPoint dragLocForDHTMLDrag(const IntPoint& mouseDraggedPoint, const Int
Point& dragOrigin, const IntPoint& dragImageOffset, bool isLinkImage) | |
| 565 { | |
| 566 // dragImageOffset is the cursor position relative to the lower-left corner
of the image. | |
| 567 #if PLATFORM(MAC) | |
| 568 // We add in the Y dimension because we are a flipped view, so adding moves
the image down. | |
| 569 const int yOffset = dragImageOffset.y(); | |
| 570 #else | |
| 571 const int yOffset = -dragImageOffset.y(); | |
| 572 #endif | |
| 573 | |
| 574 if (isLinkImage) | |
| 575 return IntPoint(mouseDraggedPoint.x() - dragImageOffset.x(), mouseDragge
dPoint.y() + yOffset); | |
| 576 | |
| 577 return IntPoint(dragOrigin.x() - dragImageOffset.x(), dragOrigin.y() + yOffs
et); | |
| 578 } | |
| 579 | |
| 580 static IntPoint dragLocForSelectionDrag(Frame* src) | |
| 581 { | |
| 582 IntRect draggingRect = enclosingIntRect(src->selectionRect()); | |
| 583 int xpos = draggingRect.right(); | |
| 584 xpos = draggingRect.x() < xpos ? draggingRect.x() : xpos; | |
| 585 int ypos = draggingRect.bottom(); | |
| 586 #if PLATFORM(MAC) | |
| 587 // Deal with flipped coordinates on Mac | |
| 588 ypos = draggingRect.y() > ypos ? draggingRect.y() : ypos; | |
| 589 #else | |
| 590 ypos = draggingRect.y() < ypos ? draggingRect.y() : ypos; | |
| 591 #endif | |
| 592 return IntPoint(xpos, ypos); | |
| 593 } | |
| 594 | |
| 595 bool DragController::startDrag(Frame* src, Clipboard* clipboard, DragOperation s
rcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, bool isDH
TMLDrag) | |
| 596 { | |
| 597 ASSERT(src); | |
| 598 ASSERT(clipboard); | |
| 599 | |
| 600 if (!src->view() || !src->contentRenderer()) | |
| 601 return false; | |
| 602 | |
| 603 HitTestResult dragSource = HitTestResult(dragOrigin); | |
| 604 dragSource = src->eventHandler()->hitTestResultAtPoint(dragOrigin, true); | |
| 605 KURL linkURL = dragSource.absoluteLinkURL(); | |
| 606 KURL imageURL = dragSource.absoluteImageURL(); | |
| 607 bool isSelected = dragSource.isSelected(); | |
| 608 | |
| 609 IntPoint mouseDraggedPoint = src->view()->windowToContents(dragEvent.pos()); | |
| 610 | |
| 611 m_draggingImageURL = KURL(); | |
| 612 m_dragOperation = srcOp; | |
| 613 | |
| 614 DragImageRef dragImage = 0; | |
| 615 IntPoint dragLoc(0, 0); | |
| 616 IntPoint dragImageOffset(0, 0); | |
| 617 | |
| 618 if (isDHTMLDrag) | |
| 619 dragImage = clipboard->createDragImage(dragImageOffset); | |
| 620 | |
| 621 // We allow DHTML/JS to set the drag image, even if its a link, image or tex
t we're dragging. | |
| 622 // This is in the spirit of the IE API, which allows overriding of pasteboar
d data and DragOp. | |
| 623 if (dragImage) { | |
| 624 dragLoc = dragLocForDHTMLDrag(mouseDraggedPoint, dragOrigin, dragImageOf
fset, !linkURL.isEmpty()); | |
| 625 m_dragOffset = dragImageOffset; | |
| 626 } | |
| 627 | |
| 628 bool startedDrag = true; // optimism - we almost always manage to start the
drag | |
| 629 | |
| 630 Node* node = dragSource.innerNonSharedNode(); | |
| 631 | |
| 632 if (!imageURL.isEmpty() && node && node->isElementNode() | |
| 633 && getImage(static_cast<Element*>(node)) | |
| 634 && (m_dragSourceAction & DragSourceActionImage)) { | |
| 635 Element* element = static_cast<Element*>(node); | |
| 636 if (!clipboard->hasData()) { | |
| 637 m_draggingImageURL = imageURL; | |
| 638 prepareClipboardForImageDrag(src, clipboard, element, linkURL, image
URL, dragSource.altDisplayString()); | |
| 639 } | |
| 640 | |
| 641 m_client->willPerformDragSourceAction(DragSourceActionImage, dragOrigin,
clipboard); | |
| 642 | |
| 643 if (!dragImage) { | |
| 644 IntRect imageRect = dragSource.imageRect(); | |
| 645 imageRect.setLocation(m_page->mainFrame()->view()->windowToContents(
src->view()->contentsToWindow(imageRect.location()))); | |
| 646 doImageDrag(element, dragOrigin, dragSource.imageRect(), clipboard,
src, m_dragOffset); | |
| 647 } else | |
| 648 // DHTML defined drag image | |
| 649 doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); | |
| 650 | |
| 651 } else if (!linkURL.isEmpty() && (m_dragSourceAction & DragSourceActionLink)
) { | |
| 652 if (!clipboard->hasData()) | |
| 653 // Simplify whitespace so the title put on the clipboard resembles w
hat the user sees | |
| 654 // on the web page. This includes replacing newlines with spaces. | |
| 655 clipboard->writeURL(linkURL, dragSource.textContent().simplifyWhiteS
pace(), src); | |
| 656 | |
| 657 m_client->willPerformDragSourceAction(DragSourceActionLink, dragOrigin,
clipboard); | |
| 658 if (!dragImage) { | |
| 659 dragImage = m_client->createDragImageForLink(linkURL, dragSource.tex
tContent(), src); | |
| 660 IntSize size = dragImageSize(dragImage); | |
| 661 m_dragOffset = IntPoint(-size.width() / 2, -LinkDragBorderInset); | |
| 662 dragLoc = IntPoint(mouseDraggedPoint.x() + m_dragOffset.x(), mouseDr
aggedPoint.y() + m_dragOffset.y()); | |
| 663 } | |
| 664 doSystemDrag(dragImage, dragLoc, mouseDraggedPoint, clipboard, src, true
); | |
| 665 } else if (isSelected && (m_dragSourceAction & DragSourceActionSelection)) { | |
| 666 RefPtr<Range> selectionRange = src->selection()->toRange(); | |
| 667 ASSERT(selectionRange); | |
| 668 if (!clipboard->hasData()) | |
| 669 clipboard->writeRange(selectionRange.get(), src); | |
| 670 m_client->willPerformDragSourceAction(DragSourceActionSelection, dragOri
gin, clipboard); | |
| 671 if (!dragImage) { | |
| 672 dragImage = createDragImageForSelection(src); | |
| 673 dragLoc = dragLocForSelectionDrag(src); | |
| 674 m_dragOffset = IntPoint((int)(dragOrigin.x() - dragLoc.x()), (int)(d
ragOrigin.y() - dragLoc.y())); | |
| 675 } | |
| 676 doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); | |
| 677 } else if (isDHTMLDrag) { | |
| 678 ASSERT(m_dragSourceAction & DragSourceActionDHTML); | |
| 679 m_client->willPerformDragSourceAction(DragSourceActionDHTML, dragOrigin,
clipboard); | |
| 680 doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false); | |
| 681 } else { | |
| 682 // Only way I know to get here is if to get here is if the original elem
ent clicked on in the mousedown is no longer | |
| 683 // under the mousedown point, so linkURL, imageURL and isSelected are al
l false/empty. | |
| 684 startedDrag = false; | |
| 685 } | |
| 686 | |
| 687 if (dragImage) | |
| 688 deleteDragImage(dragImage); | |
| 689 return startedDrag; | |
| 690 } | |
| 691 | |
| 692 void DragController::doImageDrag(Element* element, const IntPoint& dragOrigin, c
onst IntRect& rect, Clipboard* clipboard, Frame* frame, IntPoint& dragImageOffse
t) | |
| 693 { | |
| 694 IntPoint mouseDownPoint = dragOrigin; | |
| 695 DragImageRef dragImage; | |
| 696 IntPoint origin; | |
| 697 | |
| 698 Image* image = getImage(element); | |
| 699 if (image && image->size().height() * image->size().width() <= MaxOriginalIm
ageArea | |
| 700 && (dragImage = createDragImageFromImage(image))) { | |
| 701 IntSize originalSize = rect.size(); | |
| 702 origin = rect.location(); | |
| 703 | |
| 704 dragImage = fitDragImageToMaxSize(dragImage, rect.size(), maxDragImageSi
ze()); | |
| 705 dragImage = dissolveDragImageToFraction(dragImage, DragImageAlpha); | |
| 706 IntSize newSize = dragImageSize(dragImage); | |
| 707 | |
| 708 // Properly orient the drag image and orient it differently if it's smal
ler than the original | |
| 709 float scale = newSize.width() / (float)originalSize.width(); | |
| 710 float dx = origin.x() - mouseDownPoint.x(); | |
| 711 dx *= scale; | |
| 712 origin.setX((int)(dx + 0.5)); | |
| 713 #if PLATFORM(MAC) | |
| 714 //Compensate for accursed flipped coordinates in cocoa | |
| 715 origin.setY(origin.y() + originalSize.height()); | |
| 716 #endif | |
| 717 float dy = origin.y() - mouseDownPoint.y(); | |
| 718 dy *= scale; | |
| 719 origin.setY((int)(dy + 0.5)); | |
| 720 } else { | |
| 721 dragImage = createDragImageIconForCachedImage(getCachedImage(element)); | |
| 722 if (dragImage) | |
| 723 origin = IntPoint(DragIconRightInset - dragImageSize(dragImage).widt
h(), DragIconBottomInset); | |
| 724 } | |
| 725 | |
| 726 dragImageOffset.setX(mouseDownPoint.x() + origin.x()); | |
| 727 dragImageOffset.setY(mouseDownPoint.y() + origin.y()); | |
| 728 doSystemDrag(dragImage, dragImageOffset, dragOrigin, clipboard, frame, false
); | |
| 729 | |
| 730 deleteDragImage(dragImage); | |
| 731 } | |
| 732 | |
| 733 void DragController::doSystemDrag(DragImageRef image, const IntPoint& dragLoc, c
onst IntPoint& eventPos, Clipboard* clipboard, Frame* frame, bool forLink) | |
| 734 { | |
| 735 m_didInitiateDrag = true; | |
| 736 m_dragInitiator = frame->document(); | |
| 737 // Protect this frame and view, as a load may occur mid drag and attempt to
unload this frame | |
| 738 RefPtr<Frame> frameProtector = m_page->mainFrame(); | |
| 739 RefPtr<FrameView> viewProtector = frameProtector->view(); | |
| 740 m_client->startDrag(image, viewProtector->windowToContents(frame->view()->co
ntentsToWindow(dragLoc)), | |
| 741 viewProtector->windowToContents(frame->view()->contentsToWindow(eventPos
)), clipboard, frameProtector.get(), forLink); | |
| 742 | |
| 743 // Drag has ended, dragEnded *should* have been called, however it is possib
le | |
| 744 // for the UIDelegate to take over the drag, and fail to send the appropriat
e | |
| 745 // drag termination event. As dragEnded just resets drag variables, we just
| |
| 746 // call it anyway to be on the safe side | |
| 747 // Except if drag and drop happens asynchronously, in which case dragging | |
| 748 // has not ended. | |
| 749 //dragEnded(); | |
| 750 } | |
| 751 | |
| 752 // Manual drag caret manipulation | |
| 753 void DragController::placeDragCaret(const IntPoint& windowPoint) | |
| 754 { | |
| 755 Frame* mainFrame = m_page->mainFrame(); | |
| 756 Document* newDraggingDoc = mainFrame->documentAtPoint(windowPoint); | |
| 757 if (m_document != newDraggingDoc) { | |
| 758 if (m_document) | |
| 759 cancelDrag(); | |
| 760 m_document = newDraggingDoc; | |
| 761 } | |
| 762 if (!m_document) | |
| 763 return; | |
| 764 Frame* frame = m_document->frame(); | |
| 765 ASSERT(frame); | |
| 766 FrameView* frameView = frame->view(); | |
| 767 if (!frameView) | |
| 768 return; | |
| 769 IntPoint framePoint = frameView->windowToContents(windowPoint); | |
| 770 Selection dragCaret(frame->visiblePositionForPoint(framePoint)); | |
| 771 m_page->dragCaretController()->setSelection(dragCaret); | |
| 772 } | |
| 773 | |
| 774 } | |
| OLD | NEW |
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